Customize Shopp plugin

We're a candy gifting company and we need help to customize the shopp plugin in our wordpress site. [login to view URL] the shopp admin, we need to be able to add a product with a selection of add-on fields. a. Choices of Card Shape, b. Choice of icon, c. Add a textarea d. Add HTML text etc 2. These options will be reflected in the product page where a user can select quantity, and edit the fields to customize the greeting card. This card would be sent together with the product. 3. Validation. Data will be sent to the cart and checkout page only if all fields have been filled up (card customization options) 4. User is able to amend data in checkout and cart 5. Order is sent to the shops email address containing order data i.e product number, product name, date of order as well as card data. Each order sent from the single purchase is to be separated with a horizontal rule. Example - 1. User adds 2 products "A and B" to cart and adds messages to each card. 2. User goes to cart and sees text fields, area to add message to the card and select an icon for it. 3. User clicks on checkout and is brought to checkout page. 4. User realizes that he misspelled a name on the card for product B 5. User clicks "change" tab and is able to correct name on the card.